Metallic baffle



Dec. 3, 1929.

|. HARTER METALLIC BAFFLE Original Filed June 19. 1925 Patented Dec. 3,1929 UNITE STATES PATENT OFFICE ISAAC HARTER, OF DONGAN HILLS, NEW YORK,ASSIGNOR TO THE BABCOCK & WILCOX COMPANY, OF BAYONNE, NEW JERSEY, ACORPORATION OF NEW JERSEY METALLIC BAFFLE Application filed June 19,1925, Serial My present invention relates to baflies for water tubeboilers and more particularly to bafl'les which extend parallel to thewater tubes, and will be best understood from the following descriptionand the annexed drawings in which Fig. 1 is a front view, partly brokenaway, showing a row of water tubes and the filling pieces therebetweenconstituting a baflle; Fig. 2 is a side view of Fig. 1; Fig. 3 is asection along the line 3-3 of Fig. 1; Fig. & is an enlarged sectionthrough one of the metallic bafiie elements, and Fig. 5 is a somewhatdiagrammatic illustration, on a small scale, showing the disposition ofthe baflle in relation to a set of tubes of a Stirling boiler.

Like reference characters indicate like parts in the several views.

As is well understood, in certain types of water tube boilers, such, forinstance, as Stirlin boilers, bafiles are arranged parallel to the watertubes to direct the flow of the hot gases. Such battles are illustratedat 7 and of Fig. 5, the former extending down from the drum 8 along thefront of the bank of water tubes, and the latter extending up from thedrum 9 along the rear of the bank.

In the baifle of my present invention, I utilize a row of water tubes aspart of the baffle and fill the space between the tubes with metallicbaffle elements preferably formed of sheet metal and arranged so thatthey can readily be placed in position between the tubes with a largesurface contacting with the surfaces of the relatively cool water tubesso that the heat will be carried away from the elements and preventtheir destruction.

As best shown in Figs. 1, 2 and 3, a plurality of metallic battleelements 2 are placed end to end in the space between each pair of watertubes 1 to form, with the tubes, 2. complete wall or battle.

The body portion 2 of the baffle element or section is bent along itsopposite side edges (Fig. 4c), so as to form flanges 3 projecting on oneside of the body portion. The flanges 3 are preferably curved inwardlyon their outer surfaces, as indicated at 1, on a radius equal to theradius of curvature of the out- No. 38,197. Renewed October 11, 1929.

side of the tubes 1 in connection with which they are to be used. At oneor more points, preferably intermediate the ends of the flanges 3, slitsare made across these flanges to form tongues or projections 5 that arebent to the other side of the main body of the sheet 2, and thesetongues 5 are also preferably curved on the outside thereof, as shown at6, to conform to the curvature of the tubes with which the baflieelements are to be used. The flanges 3 and tongues 5 are so bent and areso disposed with respect to each other that they form, in eflect, an arcof a circle or the same radius as the outside of the water tubes 1.

The battle sections or elements 2 can be installed simply by springingthe tongues 5 inwardly and inserting the elements 2 between the tubes,after which the elements can be slid longitudinally, if desired, tobring the ends of successive elements into contact with each other, thusclosing entirely the space between water tubes. The curved surfaces ofthe elements 2, coming into close contact with the outside of the watertubes over a considerable area, provide a very effective means fortransferring the heat from the elements 2 to the tubes 1. By pressingthe. tongues 5 against the tubes, the flanges 3 will be drawn tightlyagainst the water tubes.

By my invention, a cheap and effective baflie may be formed, and onewhich can be readily maintained. It will also be noted that, by reasonof the tight fit between the water tubes and baflie elements, theseelements will remain in' position to form a baffle, as at 7, whichis notsupported from below. By having the metal thin, particularly in theflanges 3, the flanges will conform more readily to the surface of thewater tube so as to insure a close contact throughout the area of theflanges when the element is drawn against the water tube by the tongue5. Preferably, the tongues 5 are positioned near the middle of the bodyportion 2 so as to exert pressure on the part of the flange at each sideof the tongue, though, the same result may be accomplished by providingtwo yond the same side of tongues on each side edge of the element, oneat the top and the other at the bottom.

lVhen it is desired to install the baflie elements along bent portionsof the tubes, transverse slits may be made in the ele ments so as tofacilitate bending the elements to conform to the bends in the boilertubes.

I claim 1. A baille element for a water tube boiler comprising a metalmember having the greater part of each side edge extending on one sideof its main body portion and curved to extend tightly around a watertube, and the remainder of said side edge extending on the opposite sideof its main body portion and arranged to engage the water tube to holdsaid greater portion in contact with the tube.

2. A baille element for a water tube boiler comprising a metal memberhaving its opposite side edges each bent in two dire tions with most ofthe bent metal projecting bethe main body of the baffle element.

3. A battle for a Water tube boiler comprising a row of water tubesspaced apart and metal elements in the spaces between the tubes and inthe plane of the row of tubes, each of said elements having a main bodyportion and an integral curved flange along each edge of said bodyportion and fitting snugly against the surface of the adjacent watertube and an integral tongue bent outwardly away from said flange andcontacting with the water tube to hold the flange in tight contact withthe tube. V

4. A baffle for a water tube boiler comprising a row of water tubesspaced apart and metal elements in the spaces between the tubes and inthe plane of the row of tubes, each of said elements having a main bodyportion and an integral curved flange along each edge of said bodyportion and fitting snugly against the surface of the adjacent watertube and an integral tongue bent outwardly away from said flange andcontacting with the water tubes to hold the flange in tight contact withthe tube, said tongue being relatively narrow and said flange beingrelatively wide.

5. A battle for a water tube boiler comprising a row of water tubesspaced apart and metal elements in the spaces between the tubes and inthe plane of the row of tubes, each of said elements havinga main bodyportion and an integral curved flange along each edge of said bodyportion and fitting snugly against the surface of the adjacent watertube and an integral tongue bent outwardly away from said flange andcontacting with the water tube to hold the flange in tight contact withthe tube, said tongue being relatively narrow and positioned between thetop and the bottom of the element, with the remainder of the edge of theelement formed into a flange.

6. A baffle element comprising a sheet of metal, an edge of said sheetbeing provided with slits, and a section between adjacent slits beingbent outwardly to form means adapted to engage a tube.

7. A battle element comprising a sheet of metal, opposite edges thereofbeing provided with slits, and sections between said slits being bentoutwardly to form means adapted to engage a tube.

8. A baffle element comprising a sheet of metal having an edge portionthereof divided into a plurality of parts longitudinally of the edge, atleast one of said parts extending outwardly on one sideof the bodyportion of the sheet and at least one other part extending outwardly onthe other side of said body portion, said outwardly extending partsbeing adapted to engage a tube.

ISAAC HARTER.

